320500216 has 64 divisors (see below), whose sum is σ = 650073600. Its totient is φ = 147742848.

The previous prime is 320500181. The next prime is 320500231. The reversal of 320500216 is 612005023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320500193 and 320500202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218501 + ... + 1218763.

It is an arithmetic number, because the mean of its divisors is an integer number (10157400).

Almost surely, 2^320500216 is an apocalyptic number.

It is an amenable number.

320500216 is an abundant number, since it is smaller than the sum of its proper divisors (329573384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320500216 is a wasteful number, since it uses less digits than its factorization.

320500216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 320500216 is about 17902.5198226395. The cubic root of 320500216 is about 684.3465920139.

Adding to 320500216 its reverse (612005023), we get a palindrome (932505239).

The spelling of 320500216 in words is "three hundred twenty million, five hundred thousand, two hundred sixteen".